A Prospective, Biomarker-Stratified Phase 2 Study: β-Hydroxybutyrate as a Predictive Biomarker for Short-Course Radiotherapy Followed by Chemotherapy Plus PD-1 Inhibitor Versus Chemotherapy Alone in Locally Advanced Rectal Cancer

Official record

Identifier

NCT07847229

Recruiting locations

country

China

Interventions studied

Short-course radiotherapyCapecitabineOxaliplatinTME surgeryPD -1/PD-L1 monoclonal antibodyWatch & Wait strategy

Lead sponsor

Tao Zhang

Target enrolment

120 participants

Study type

INTERVENTIONAL

Phase

Phase 2

Status

Not yet recruiting

First posted

Sep 29, 2026

Last updated on the registry

Sep 29, 2026

Age

18 Years – 75 Years

Sex

ALL

Study contact

The official record lists a study contact. Contact details are published there and are intentionally not copied to this page.

Eligibility criteria

Reproduced verbatim from the official record. Eligibility is decided by the study team, never by this page.

Inclusion Criteria:

1. Patients or their family members agree to participate in the study and sign the informed consent form;
2. Age 18-75 years, male or female;
3. Histologically confirmed Locally Advanced rectal adenocarcinoma;
4. inferior margin ≤ 10 cm from the anal verge;
5. ECOG performance status score is 0-1;
6. Untreated with anti-tumor therapy for rectal cancer, including radiotherapy, chemotherapy, surgery, etc;
7. There was no operative contraindication;
8. Laboratory tests were required to meet the following requirements: white blood cell (WBC) ≥ 4×109/L; Absolute neutrophil count (ANC) ≥ 1.5×109/L; Platelet count ≥ 100×109/L; Hemoglobin ≥90 g/L; Serum total bilirubin ≤ 1.5 × upper limit of normal (ULN); Serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) ≤ 2.5 × ULN; Serum creatinine ≤1.5 times the upper limit of normal value or creatinine clearance rate ≥50 mL/min; International normalized ratio (INR) ≤ 1.5 × ULN; Activated partial thromboplastin time (APTT) ≤ 1.5 × ULN;
9. Urinary protein \< 2+ or 24-hour urinary protein excretion \< 1 g at baseline.

Exclusion Criteria:

1. Patients with non-pMMR LARC；
2. Subjects who have previously received any form of immunotherapy, including but not limited to immune checkpoint inhibitors, immune checkpoint agonists, immune cell therapy, or any other treatment targeting tumor immunomodulatory mechanisms;
3. Presence of any concurrent disease, condition (including laboratory abnormality), history of substance abuse, or current evidence thereof, which, in the judgment of the Investigator, may compromise subject safety, interfere with the process of obtaining informed consent, affect subject compliance, or confound the safety assessment of the investigational product(s).

Indexed under

Colorectal Cancer